XML 61 R49.htm IDEA: XBRL DOCUMENT
v3.20.2

Commitments and Contingencies Expenses for asbestos- related litigation (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Asbestos related litigation [Abstract] |  |  |  |
Liability for Asbestos and Environmental Claims, Net, Incurred Loss | $ 1.2 | $ 0.4 | $ (0.5) | $ 1.8

X
- Definition Asbestos related litigation [Abstract] + References No definition available. + Details
Name: | lii_AsbestosrelatedlitigationAbstract
Namespace Prefix: | lii_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after effects of reinsurance, of expense for claims incurred and costs incurred in the claim settlement process attributable to asbestos and environmental claims. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437 + Details
Name: | us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNetIncurredLoss1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration